Truncated channel state information feedback

Abstract

This disclosure describes systems, methods, and devices related to truncated channel state information (CSI) feedback. A device may establish a communication link with a station device. The device may identify a feedback frame received from the station device, wherein the feedback frame comprises information associated with channel state information (CSI). The device may identify the feedback frame as one or more feedback samples.

What is claimed is: 
     
         1 . A device, the device comprising processing circuitry coupled to storage, the processing circuitry configured to:
 establish a communication link with a station device;   identify a feedback frame received from the station device, wherein the feedback frame comprises information associated with channel state information (CSI), wherein the feedback frame comprises a tail, and wherein the tail is at an end of an inverse Fast Fourier Transform (IFFT) time window; and   identify the feedback frame as one or more feedback samples.   
     
     
         2 . The device of  claim 1 , wherein the one or more feedback samples are sampled every 4, 8, 16 samples. 
     
     
         3 . The device of  claim 1 , wherein the one or more feedback samples are received during one or more time interval. 
     
     
         4 . The device of  claim 1 , wherein the tail is considered as a wraparound of a second tail ahead of a cluster. 
     
     
         5 . The device of  claim 1 , wherein the tail is fed back until the tail decays below a threshold. 
     
     
         6 . The device of  claim 5 , wherein the threshold is determined by a noise level, an interference, a signal power, or a peak of a multipath associated with the communication link. 
     
     
         7 . The device of  claim 6 , further comprising an antenna coupled to the transceiver to cause to send the feedback frame. 
     
     
         8 . The device of  claim 1 , further comprising a transceiver configured to transmit and receive wireless signals. 
     
     
         9 . A non-transitory computer-readable medium storing computer-executable instructions which when executed by one or more processors result in performing operations comprising:
 establishing a communication link with a station device;   identifying a feedback frame received from the station device, wherein the feedback frame comprises information associated with channel state information (CSI), wherein the feedback frame comprises a tail, and wherein the tail is considered as a wraparound of a second tail ahead of a cluster; and   identifying the feedback frame as one or more feedback samples.   
     
     
         10 . The non-transitory computer-readable medium of  claim 9 , wherein the one or more feedback samples are sampled every 4, 8, 16 samples. 
     
     
         11 . The non-transitory computer-readable medium of  claim 9 , wherein the one or more feedback samples are received during one or more time interval. 
     
     
         12 . The non-transitory computer-readable medium of  claim 9 , wherein the feedback frame comprises a tail. 
     
     
         13 . The non-transitory computer-readable medium of  claim 12 , wherein the tail is at an end of an inverse Fast Fourier Transform (IFFT) time window. 
     
     
         14 . The non-transitory computer-readable medium of  claim 12 , wherein the tail is fed back until the tail decays below a threshold. 
     
     
         15 . The non-transitory computer-readable medium of  claim 14 , wherein the threshold is determined by a noise level, an interference, a signal power, or a peak of a multipath associated with the communication link. 
     
     
         16 . A method comprising:
 establishing, by one or more processors, a communication link with a station device;   identifying a feedback frame received from the station device, wherein the feedback frame comprises information associated with channel state information (CSI); and   identifying the feedback frame as one or more feedback samples, wherein the feedback frame comprises a tail, and wherein the tail is at an end of an inverse Fast Fourier Transform (IFFT) time window.